1 /*******************************************************************************
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 - 2012 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30 #include <linux/module.h>
31 #include <linux/types.h>
32 #include <linux/init.h>
33 #include <linux/pci.h>
34 #include <linux/vmalloc.h>
35 #include <linux/pagemap.h>
36 #include <linux/delay.h>
37 #include <linux/netdevice.h>
38 #include <linux/tcp.h>
39 #include <linux/ipv6.h>
40 #include <linux/slab.h>
41 #include <net/checksum.h>
42 #include <net/ip6_checksum.h>
43 #include <linux/mii.h>
44 #include <linux/ethtool.h>
45 #include <linux/if_vlan.h>
46 #include <linux/prefetch.h>
50 #define DRV_VERSION "2.0.2-k"
51 char igbvf_driver_name
[] = "igbvf";
52 const char igbvf_driver_version
[] = DRV_VERSION
;
53 static const char igbvf_driver_string
[] =
54 "Intel(R) Gigabit Virtual Function Network Driver";
55 static const char igbvf_copyright
[] =
56 "Copyright (c) 2009 - 2012 Intel Corporation.";
58 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
59 static int debug
= -1;
60 module_param(debug
, int, 0);
61 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
63 static int igbvf_poll(struct napi_struct
*napi
, int budget
);
64 static void igbvf_reset(struct igbvf_adapter
*);
65 static void igbvf_set_interrupt_capability(struct igbvf_adapter
*);
66 static void igbvf_reset_interrupt_capability(struct igbvf_adapter
*);
68 static struct igbvf_info igbvf_vf_info
= {
72 .init_ops
= e1000_init_function_pointers_vf
,
75 static struct igbvf_info igbvf_i350_vf_info
= {
76 .mac
= e1000_vfadapt_i350
,
79 .init_ops
= e1000_init_function_pointers_vf
,
82 static const struct igbvf_info
*igbvf_info_tbl
[] = {
83 [board_vf
] = &igbvf_vf_info
,
84 [board_i350_vf
] = &igbvf_i350_vf_info
,
88 * igbvf_desc_unused - calculate if we have unused descriptors
90 static int igbvf_desc_unused(struct igbvf_ring
*ring
)
92 if (ring
->next_to_clean
> ring
->next_to_use
)
93 return ring
->next_to_clean
- ring
->next_to_use
- 1;
95 return ring
->count
+ ring
->next_to_clean
- ring
->next_to_use
- 1;
99 * igbvf_receive_skb - helper function to handle Rx indications
100 * @adapter: board private structure
101 * @status: descriptor status field as written by hardware
102 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
103 * @skb: pointer to sk_buff to be indicated to stack
105 static void igbvf_receive_skb(struct igbvf_adapter
*adapter
,
106 struct net_device
*netdev
,
108 u32 status
, u16 vlan
)
112 if (status
& E1000_RXD_STAT_VP
) {
113 if ((adapter
->flags
& IGBVF_FLAG_RX_LB_VLAN_BSWAP
) &&
114 (status
& E1000_RXDEXT_STATERR_LB
))
115 vid
= be16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
;
117 vid
= le16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
;
118 if (test_bit(vid
, adapter
->active_vlans
))
119 __vlan_hwaccel_put_tag(skb
, vid
);
122 napi_gro_receive(&adapter
->rx_ring
->napi
, skb
);
125 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter
*adapter
,
126 u32 status_err
, struct sk_buff
*skb
)
128 skb_checksum_none_assert(skb
);
130 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
131 if ((status_err
& E1000_RXD_STAT_IXSM
) ||
132 (adapter
->flags
& IGBVF_FLAG_RX_CSUM_DISABLED
))
135 /* TCP/UDP checksum error bit is set */
137 (E1000_RXDEXT_STATERR_TCPE
| E1000_RXDEXT_STATERR_IPE
)) {
138 /* let the stack verify checksum errors */
139 adapter
->hw_csum_err
++;
143 /* It must be a TCP or UDP packet with a valid checksum */
144 if (status_err
& (E1000_RXD_STAT_TCPCS
| E1000_RXD_STAT_UDPCS
))
145 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
147 adapter
->hw_csum_good
++;
151 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
152 * @rx_ring: address of ring structure to repopulate
153 * @cleaned_count: number of buffers to repopulate
155 static void igbvf_alloc_rx_buffers(struct igbvf_ring
*rx_ring
,
158 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
159 struct net_device
*netdev
= adapter
->netdev
;
160 struct pci_dev
*pdev
= adapter
->pdev
;
161 union e1000_adv_rx_desc
*rx_desc
;
162 struct igbvf_buffer
*buffer_info
;
167 i
= rx_ring
->next_to_use
;
168 buffer_info
= &rx_ring
->buffer_info
[i
];
170 if (adapter
->rx_ps_hdr_size
)
171 bufsz
= adapter
->rx_ps_hdr_size
;
173 bufsz
= adapter
->rx_buffer_len
;
175 while (cleaned_count
--) {
176 rx_desc
= IGBVF_RX_DESC_ADV(*rx_ring
, i
);
178 if (adapter
->rx_ps_hdr_size
&& !buffer_info
->page_dma
) {
179 if (!buffer_info
->page
) {
180 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
181 if (!buffer_info
->page
) {
182 adapter
->alloc_rx_buff_failed
++;
185 buffer_info
->page_offset
= 0;
187 buffer_info
->page_offset
^= PAGE_SIZE
/ 2;
189 buffer_info
->page_dma
=
190 dma_map_page(&pdev
->dev
, buffer_info
->page
,
191 buffer_info
->page_offset
,
194 if (dma_mapping_error(&pdev
->dev
,
195 buffer_info
->page_dma
)) {
196 __free_page(buffer_info
->page
);
197 buffer_info
->page
= NULL
;
198 dev_err(&pdev
->dev
, "RX DMA map failed\n");
203 if (!buffer_info
->skb
) {
204 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
206 adapter
->alloc_rx_buff_failed
++;
210 buffer_info
->skb
= skb
;
211 buffer_info
->dma
= dma_map_single(&pdev
->dev
, skb
->data
,
214 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
215 dev_kfree_skb(buffer_info
->skb
);
216 buffer_info
->skb
= NULL
;
217 dev_err(&pdev
->dev
, "RX DMA map failed\n");
221 /* Refresh the desc even if buffer_addrs didn't change because
222 * each write-back erases this info. */
223 if (adapter
->rx_ps_hdr_size
) {
224 rx_desc
->read
.pkt_addr
=
225 cpu_to_le64(buffer_info
->page_dma
);
226 rx_desc
->read
.hdr_addr
= cpu_to_le64(buffer_info
->dma
);
228 rx_desc
->read
.pkt_addr
=
229 cpu_to_le64(buffer_info
->dma
);
230 rx_desc
->read
.hdr_addr
= 0;
234 if (i
== rx_ring
->count
)
236 buffer_info
= &rx_ring
->buffer_info
[i
];
240 if (rx_ring
->next_to_use
!= i
) {
241 rx_ring
->next_to_use
= i
;
243 i
= (rx_ring
->count
- 1);
247 /* Force memory writes to complete before letting h/w
248 * know there are new descriptors to fetch. (Only
249 * applicable for weak-ordered memory model archs,
252 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
257 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
258 * @adapter: board private structure
260 * the return value indicates whether actual cleaning was done, there
261 * is no guarantee that everything was cleaned
263 static bool igbvf_clean_rx_irq(struct igbvf_adapter
*adapter
,
264 int *work_done
, int work_to_do
)
266 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
267 struct net_device
*netdev
= adapter
->netdev
;
268 struct pci_dev
*pdev
= adapter
->pdev
;
269 union e1000_adv_rx_desc
*rx_desc
, *next_rxd
;
270 struct igbvf_buffer
*buffer_info
, *next_buffer
;
272 bool cleaned
= false;
273 int cleaned_count
= 0;
274 unsigned int total_bytes
= 0, total_packets
= 0;
276 u32 length
, hlen
, staterr
;
278 i
= rx_ring
->next_to_clean
;
279 rx_desc
= IGBVF_RX_DESC_ADV(*rx_ring
, i
);
280 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
282 while (staterr
& E1000_RXD_STAT_DD
) {
283 if (*work_done
>= work_to_do
)
286 rmb(); /* read descriptor and rx_buffer_info after status DD */
288 buffer_info
= &rx_ring
->buffer_info
[i
];
290 /* HW will not DMA in data larger than the given buffer, even
291 * if it parses the (NFS, of course) header to be larger. In
292 * that case, it fills the header buffer and spills the rest
295 hlen
= (le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hs_rss
.hdr_info
) &
296 E1000_RXDADV_HDRBUFLEN_MASK
) >> E1000_RXDADV_HDRBUFLEN_SHIFT
;
297 if (hlen
> adapter
->rx_ps_hdr_size
)
298 hlen
= adapter
->rx_ps_hdr_size
;
300 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
304 skb
= buffer_info
->skb
;
305 prefetch(skb
->data
- NET_IP_ALIGN
);
306 buffer_info
->skb
= NULL
;
307 if (!adapter
->rx_ps_hdr_size
) {
308 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
309 adapter
->rx_buffer_len
,
311 buffer_info
->dma
= 0;
312 skb_put(skb
, length
);
316 if (!skb_shinfo(skb
)->nr_frags
) {
317 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
318 adapter
->rx_ps_hdr_size
,
324 dma_unmap_page(&pdev
->dev
, buffer_info
->page_dma
,
327 buffer_info
->page_dma
= 0;
329 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
,
331 buffer_info
->page_offset
,
334 if ((adapter
->rx_buffer_len
> (PAGE_SIZE
/ 2)) ||
335 (page_count(buffer_info
->page
) != 1))
336 buffer_info
->page
= NULL
;
338 get_page(buffer_info
->page
);
341 skb
->data_len
+= length
;
342 skb
->truesize
+= PAGE_SIZE
/ 2;
346 if (i
== rx_ring
->count
)
348 next_rxd
= IGBVF_RX_DESC_ADV(*rx_ring
, i
);
350 next_buffer
= &rx_ring
->buffer_info
[i
];
352 if (!(staterr
& E1000_RXD_STAT_EOP
)) {
353 buffer_info
->skb
= next_buffer
->skb
;
354 buffer_info
->dma
= next_buffer
->dma
;
355 next_buffer
->skb
= skb
;
356 next_buffer
->dma
= 0;
360 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
361 dev_kfree_skb_irq(skb
);
365 total_bytes
+= skb
->len
;
368 igbvf_rx_checksum_adv(adapter
, staterr
, skb
);
370 skb
->protocol
= eth_type_trans(skb
, netdev
);
372 igbvf_receive_skb(adapter
, netdev
, skb
, staterr
,
373 rx_desc
->wb
.upper
.vlan
);
376 rx_desc
->wb
.upper
.status_error
= 0;
378 /* return some buffers to hardware, one at a time is too slow */
379 if (cleaned_count
>= IGBVF_RX_BUFFER_WRITE
) {
380 igbvf_alloc_rx_buffers(rx_ring
, cleaned_count
);
384 /* use prefetched values */
386 buffer_info
= next_buffer
;
388 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
391 rx_ring
->next_to_clean
= i
;
392 cleaned_count
= igbvf_desc_unused(rx_ring
);
395 igbvf_alloc_rx_buffers(rx_ring
, cleaned_count
);
397 adapter
->total_rx_packets
+= total_packets
;
398 adapter
->total_rx_bytes
+= total_bytes
;
399 adapter
->net_stats
.rx_bytes
+= total_bytes
;
400 adapter
->net_stats
.rx_packets
+= total_packets
;
404 static void igbvf_put_txbuf(struct igbvf_adapter
*adapter
,
405 struct igbvf_buffer
*buffer_info
)
407 if (buffer_info
->dma
) {
408 if (buffer_info
->mapped_as_page
)
409 dma_unmap_page(&adapter
->pdev
->dev
,
414 dma_unmap_single(&adapter
->pdev
->dev
,
418 buffer_info
->dma
= 0;
420 if (buffer_info
->skb
) {
421 dev_kfree_skb_any(buffer_info
->skb
);
422 buffer_info
->skb
= NULL
;
424 buffer_info
->time_stamp
= 0;
428 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
429 * @adapter: board private structure
431 * Return 0 on success, negative on failure
433 int igbvf_setup_tx_resources(struct igbvf_adapter
*adapter
,
434 struct igbvf_ring
*tx_ring
)
436 struct pci_dev
*pdev
= adapter
->pdev
;
439 size
= sizeof(struct igbvf_buffer
) * tx_ring
->count
;
440 tx_ring
->buffer_info
= vzalloc(size
);
441 if (!tx_ring
->buffer_info
)
444 /* round up to nearest 4K */
445 tx_ring
->size
= tx_ring
->count
* sizeof(union e1000_adv_tx_desc
);
446 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
448 tx_ring
->desc
= dma_alloc_coherent(&pdev
->dev
, tx_ring
->size
,
449 &tx_ring
->dma
, GFP_KERNEL
);
454 tx_ring
->adapter
= adapter
;
455 tx_ring
->next_to_use
= 0;
456 tx_ring
->next_to_clean
= 0;
460 vfree(tx_ring
->buffer_info
);
461 dev_err(&adapter
->pdev
->dev
,
462 "Unable to allocate memory for the transmit descriptor ring\n");
467 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
468 * @adapter: board private structure
470 * Returns 0 on success, negative on failure
472 int igbvf_setup_rx_resources(struct igbvf_adapter
*adapter
,
473 struct igbvf_ring
*rx_ring
)
475 struct pci_dev
*pdev
= adapter
->pdev
;
478 size
= sizeof(struct igbvf_buffer
) * rx_ring
->count
;
479 rx_ring
->buffer_info
= vzalloc(size
);
480 if (!rx_ring
->buffer_info
)
483 desc_len
= sizeof(union e1000_adv_rx_desc
);
485 /* Round up to nearest 4K */
486 rx_ring
->size
= rx_ring
->count
* desc_len
;
487 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
489 rx_ring
->desc
= dma_alloc_coherent(&pdev
->dev
, rx_ring
->size
,
490 &rx_ring
->dma
, GFP_KERNEL
);
495 rx_ring
->next_to_clean
= 0;
496 rx_ring
->next_to_use
= 0;
498 rx_ring
->adapter
= adapter
;
503 vfree(rx_ring
->buffer_info
);
504 rx_ring
->buffer_info
= NULL
;
505 dev_err(&adapter
->pdev
->dev
,
506 "Unable to allocate memory for the receive descriptor ring\n");
511 * igbvf_clean_tx_ring - Free Tx Buffers
512 * @tx_ring: ring to be cleaned
514 static void igbvf_clean_tx_ring(struct igbvf_ring
*tx_ring
)
516 struct igbvf_adapter
*adapter
= tx_ring
->adapter
;
517 struct igbvf_buffer
*buffer_info
;
521 if (!tx_ring
->buffer_info
)
524 /* Free all the Tx ring sk_buffs */
525 for (i
= 0; i
< tx_ring
->count
; i
++) {
526 buffer_info
= &tx_ring
->buffer_info
[i
];
527 igbvf_put_txbuf(adapter
, buffer_info
);
530 size
= sizeof(struct igbvf_buffer
) * tx_ring
->count
;
531 memset(tx_ring
->buffer_info
, 0, size
);
533 /* Zero out the descriptor ring */
534 memset(tx_ring
->desc
, 0, tx_ring
->size
);
536 tx_ring
->next_to_use
= 0;
537 tx_ring
->next_to_clean
= 0;
539 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
540 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
544 * igbvf_free_tx_resources - Free Tx Resources per Queue
545 * @tx_ring: ring to free resources from
547 * Free all transmit software resources
549 void igbvf_free_tx_resources(struct igbvf_ring
*tx_ring
)
551 struct pci_dev
*pdev
= tx_ring
->adapter
->pdev
;
553 igbvf_clean_tx_ring(tx_ring
);
555 vfree(tx_ring
->buffer_info
);
556 tx_ring
->buffer_info
= NULL
;
558 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
561 tx_ring
->desc
= NULL
;
565 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
566 * @adapter: board private structure
568 static void igbvf_clean_rx_ring(struct igbvf_ring
*rx_ring
)
570 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
571 struct igbvf_buffer
*buffer_info
;
572 struct pci_dev
*pdev
= adapter
->pdev
;
576 if (!rx_ring
->buffer_info
)
579 /* Free all the Rx ring sk_buffs */
580 for (i
= 0; i
< rx_ring
->count
; i
++) {
581 buffer_info
= &rx_ring
->buffer_info
[i
];
582 if (buffer_info
->dma
) {
583 if (adapter
->rx_ps_hdr_size
){
584 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
585 adapter
->rx_ps_hdr_size
,
588 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
589 adapter
->rx_buffer_len
,
592 buffer_info
->dma
= 0;
595 if (buffer_info
->skb
) {
596 dev_kfree_skb(buffer_info
->skb
);
597 buffer_info
->skb
= NULL
;
600 if (buffer_info
->page
) {
601 if (buffer_info
->page_dma
)
602 dma_unmap_page(&pdev
->dev
,
603 buffer_info
->page_dma
,
606 put_page(buffer_info
->page
);
607 buffer_info
->page
= NULL
;
608 buffer_info
->page_dma
= 0;
609 buffer_info
->page_offset
= 0;
613 size
= sizeof(struct igbvf_buffer
) * rx_ring
->count
;
614 memset(rx_ring
->buffer_info
, 0, size
);
616 /* Zero out the descriptor ring */
617 memset(rx_ring
->desc
, 0, rx_ring
->size
);
619 rx_ring
->next_to_clean
= 0;
620 rx_ring
->next_to_use
= 0;
622 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
623 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
627 * igbvf_free_rx_resources - Free Rx Resources
628 * @rx_ring: ring to clean the resources from
630 * Free all receive software resources
633 void igbvf_free_rx_resources(struct igbvf_ring
*rx_ring
)
635 struct pci_dev
*pdev
= rx_ring
->adapter
->pdev
;
637 igbvf_clean_rx_ring(rx_ring
);
639 vfree(rx_ring
->buffer_info
);
640 rx_ring
->buffer_info
= NULL
;
642 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
644 rx_ring
->desc
= NULL
;
648 * igbvf_update_itr - update the dynamic ITR value based on statistics
649 * @adapter: pointer to adapter
650 * @itr_setting: current adapter->itr
651 * @packets: the number of packets during this measurement interval
652 * @bytes: the number of bytes during this measurement interval
654 * Stores a new ITR value based on packets and byte
655 * counts during the last interrupt. The advantage of per interrupt
656 * computation is faster updates and more accurate ITR for the current
657 * traffic pattern. Constants in this function were computed
658 * based on theoretical maximum wire speed and thresholds were set based
659 * on testing data as well as attempting to minimize response time
660 * while increasing bulk throughput.
662 static enum latency_range
igbvf_update_itr(struct igbvf_adapter
*adapter
,
663 enum latency_range itr_setting
,
664 int packets
, int bytes
)
666 enum latency_range retval
= itr_setting
;
669 goto update_itr_done
;
671 switch (itr_setting
) {
673 /* handle TSO and jumbo frames */
674 if (bytes
/packets
> 8000)
675 retval
= bulk_latency
;
676 else if ((packets
< 5) && (bytes
> 512))
677 retval
= low_latency
;
679 case low_latency
: /* 50 usec aka 20000 ints/s */
681 /* this if handles the TSO accounting */
682 if (bytes
/packets
> 8000)
683 retval
= bulk_latency
;
684 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
685 retval
= bulk_latency
;
686 else if ((packets
> 35))
687 retval
= lowest_latency
;
688 } else if (bytes
/packets
> 2000) {
689 retval
= bulk_latency
;
690 } else if (packets
<= 2 && bytes
< 512) {
691 retval
= lowest_latency
;
694 case bulk_latency
: /* 250 usec aka 4000 ints/s */
697 retval
= low_latency
;
698 } else if (bytes
< 6000) {
699 retval
= low_latency
;
710 static int igbvf_range_to_itr(enum latency_range current_range
)
714 switch (current_range
) {
715 /* counts and packets in update_itr are dependent on these numbers */
717 new_itr
= IGBVF_70K_ITR
;
720 new_itr
= IGBVF_20K_ITR
;
723 new_itr
= IGBVF_4K_ITR
;
726 new_itr
= IGBVF_START_ITR
;
732 static void igbvf_set_itr(struct igbvf_adapter
*adapter
)
736 adapter
->tx_ring
->itr_range
=
737 igbvf_update_itr(adapter
,
738 adapter
->tx_ring
->itr_val
,
739 adapter
->total_tx_packets
,
740 adapter
->total_tx_bytes
);
742 /* conservative mode (itr 3) eliminates the lowest_latency setting */
743 if (adapter
->requested_itr
== 3 &&
744 adapter
->tx_ring
->itr_range
== lowest_latency
)
745 adapter
->tx_ring
->itr_range
= low_latency
;
747 new_itr
= igbvf_range_to_itr(adapter
->tx_ring
->itr_range
);
750 if (new_itr
!= adapter
->tx_ring
->itr_val
) {
751 u32 current_itr
= adapter
->tx_ring
->itr_val
;
753 * this attempts to bias the interrupt rate towards Bulk
754 * by adding intermediate steps when interrupt rate is
757 new_itr
= new_itr
> current_itr
?
758 min(current_itr
+ (new_itr
>> 2), new_itr
) :
760 adapter
->tx_ring
->itr_val
= new_itr
;
762 adapter
->tx_ring
->set_itr
= 1;
765 adapter
->rx_ring
->itr_range
=
766 igbvf_update_itr(adapter
, adapter
->rx_ring
->itr_val
,
767 adapter
->total_rx_packets
,
768 adapter
->total_rx_bytes
);
769 if (adapter
->requested_itr
== 3 &&
770 adapter
->rx_ring
->itr_range
== lowest_latency
)
771 adapter
->rx_ring
->itr_range
= low_latency
;
773 new_itr
= igbvf_range_to_itr(adapter
->rx_ring
->itr_range
);
775 if (new_itr
!= adapter
->rx_ring
->itr_val
) {
776 u32 current_itr
= adapter
->rx_ring
->itr_val
;
777 new_itr
= new_itr
> current_itr
?
778 min(current_itr
+ (new_itr
>> 2), new_itr
) :
780 adapter
->rx_ring
->itr_val
= new_itr
;
782 adapter
->rx_ring
->set_itr
= 1;
787 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
788 * @adapter: board private structure
790 * returns true if ring is completely cleaned
792 static bool igbvf_clean_tx_irq(struct igbvf_ring
*tx_ring
)
794 struct igbvf_adapter
*adapter
= tx_ring
->adapter
;
795 struct net_device
*netdev
= adapter
->netdev
;
796 struct igbvf_buffer
*buffer_info
;
798 union e1000_adv_tx_desc
*tx_desc
, *eop_desc
;
799 unsigned int total_bytes
= 0, total_packets
= 0;
800 unsigned int i
, eop
, count
= 0;
801 bool cleaned
= false;
803 i
= tx_ring
->next_to_clean
;
804 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
805 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
807 while ((eop_desc
->wb
.status
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
808 (count
< tx_ring
->count
)) {
809 rmb(); /* read buffer_info after eop_desc status */
810 for (cleaned
= false; !cleaned
; count
++) {
811 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
812 buffer_info
= &tx_ring
->buffer_info
[i
];
813 cleaned
= (i
== eop
);
814 skb
= buffer_info
->skb
;
817 unsigned int segs
, bytecount
;
819 /* gso_segs is currently only valid for tcp */
820 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
821 /* multiply data chunks by size of headers */
822 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
824 total_packets
+= segs
;
825 total_bytes
+= bytecount
;
828 igbvf_put_txbuf(adapter
, buffer_info
);
829 tx_desc
->wb
.status
= 0;
832 if (i
== tx_ring
->count
)
835 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
836 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
839 tx_ring
->next_to_clean
= i
;
841 if (unlikely(count
&&
842 netif_carrier_ok(netdev
) &&
843 igbvf_desc_unused(tx_ring
) >= IGBVF_TX_QUEUE_WAKE
)) {
844 /* Make sure that anybody stopping the queue after this
845 * sees the new next_to_clean.
848 if (netif_queue_stopped(netdev
) &&
849 !(test_bit(__IGBVF_DOWN
, &adapter
->state
))) {
850 netif_wake_queue(netdev
);
851 ++adapter
->restart_queue
;
855 adapter
->net_stats
.tx_bytes
+= total_bytes
;
856 adapter
->net_stats
.tx_packets
+= total_packets
;
857 return count
< tx_ring
->count
;
860 static irqreturn_t
igbvf_msix_other(int irq
, void *data
)
862 struct net_device
*netdev
= data
;
863 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
864 struct e1000_hw
*hw
= &adapter
->hw
;
866 adapter
->int_counter1
++;
868 netif_carrier_off(netdev
);
869 hw
->mac
.get_link_status
= 1;
870 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
871 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
873 ew32(EIMS
, adapter
->eims_other
);
878 static irqreturn_t
igbvf_intr_msix_tx(int irq
, void *data
)
880 struct net_device
*netdev
= data
;
881 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
882 struct e1000_hw
*hw
= &adapter
->hw
;
883 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
885 if (tx_ring
->set_itr
) {
886 writel(tx_ring
->itr_val
,
887 adapter
->hw
.hw_addr
+ tx_ring
->itr_register
);
888 adapter
->tx_ring
->set_itr
= 0;
891 adapter
->total_tx_bytes
= 0;
892 adapter
->total_tx_packets
= 0;
894 /* auto mask will automatically reenable the interrupt when we write
896 if (!igbvf_clean_tx_irq(tx_ring
))
897 /* Ring was not completely cleaned, so fire another interrupt */
898 ew32(EICS
, tx_ring
->eims_value
);
900 ew32(EIMS
, tx_ring
->eims_value
);
905 static irqreturn_t
igbvf_intr_msix_rx(int irq
, void *data
)
907 struct net_device
*netdev
= data
;
908 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
910 adapter
->int_counter0
++;
912 /* Write the ITR value calculated at the end of the
913 * previous interrupt.
915 if (adapter
->rx_ring
->set_itr
) {
916 writel(adapter
->rx_ring
->itr_val
,
917 adapter
->hw
.hw_addr
+ adapter
->rx_ring
->itr_register
);
918 adapter
->rx_ring
->set_itr
= 0;
921 if (napi_schedule_prep(&adapter
->rx_ring
->napi
)) {
922 adapter
->total_rx_bytes
= 0;
923 adapter
->total_rx_packets
= 0;
924 __napi_schedule(&adapter
->rx_ring
->napi
);
930 #define IGBVF_NO_QUEUE -1
932 static void igbvf_assign_vector(struct igbvf_adapter
*adapter
, int rx_queue
,
933 int tx_queue
, int msix_vector
)
935 struct e1000_hw
*hw
= &adapter
->hw
;
938 /* 82576 uses a table-based method for assigning vectors.
939 Each queue has a single entry in the table to which we write
940 a vector number along with a "valid" bit. Sadly, the layout
941 of the table is somewhat counterintuitive. */
942 if (rx_queue
> IGBVF_NO_QUEUE
) {
943 index
= (rx_queue
>> 1);
944 ivar
= array_er32(IVAR0
, index
);
945 if (rx_queue
& 0x1) {
946 /* vector goes into third byte of register */
947 ivar
= ivar
& 0xFF00FFFF;
948 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 16;
950 /* vector goes into low byte of register */
951 ivar
= ivar
& 0xFFFFFF00;
952 ivar
|= msix_vector
| E1000_IVAR_VALID
;
954 adapter
->rx_ring
[rx_queue
].eims_value
= 1 << msix_vector
;
955 array_ew32(IVAR0
, index
, ivar
);
957 if (tx_queue
> IGBVF_NO_QUEUE
) {
958 index
= (tx_queue
>> 1);
959 ivar
= array_er32(IVAR0
, index
);
960 if (tx_queue
& 0x1) {
961 /* vector goes into high byte of register */
962 ivar
= ivar
& 0x00FFFFFF;
963 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 24;
965 /* vector goes into second byte of register */
966 ivar
= ivar
& 0xFFFF00FF;
967 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 8;
969 adapter
->tx_ring
[tx_queue
].eims_value
= 1 << msix_vector
;
970 array_ew32(IVAR0
, index
, ivar
);
975 * igbvf_configure_msix - Configure MSI-X hardware
977 * igbvf_configure_msix sets up the hardware to properly
978 * generate MSI-X interrupts.
980 static void igbvf_configure_msix(struct igbvf_adapter
*adapter
)
983 struct e1000_hw
*hw
= &adapter
->hw
;
984 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
985 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
988 adapter
->eims_enable_mask
= 0;
990 igbvf_assign_vector(adapter
, IGBVF_NO_QUEUE
, 0, vector
++);
991 adapter
->eims_enable_mask
|= tx_ring
->eims_value
;
992 writel(tx_ring
->itr_val
, hw
->hw_addr
+ tx_ring
->itr_register
);
993 igbvf_assign_vector(adapter
, 0, IGBVF_NO_QUEUE
, vector
++);
994 adapter
->eims_enable_mask
|= rx_ring
->eims_value
;
995 writel(rx_ring
->itr_val
, hw
->hw_addr
+ rx_ring
->itr_register
);
997 /* set vector for other causes, i.e. link changes */
999 tmp
= (vector
++ | E1000_IVAR_VALID
);
1001 ew32(IVAR_MISC
, tmp
);
1003 adapter
->eims_enable_mask
= (1 << (vector
)) - 1;
1004 adapter
->eims_other
= 1 << (vector
- 1);
1008 static void igbvf_reset_interrupt_capability(struct igbvf_adapter
*adapter
)
1010 if (adapter
->msix_entries
) {
1011 pci_disable_msix(adapter
->pdev
);
1012 kfree(adapter
->msix_entries
);
1013 adapter
->msix_entries
= NULL
;
1018 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1020 * Attempt to configure interrupts using the best available
1021 * capabilities of the hardware and kernel.
1023 static void igbvf_set_interrupt_capability(struct igbvf_adapter
*adapter
)
1028 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
1029 adapter
->msix_entries
= kcalloc(3, sizeof(struct msix_entry
),
1031 if (adapter
->msix_entries
) {
1032 for (i
= 0; i
< 3; i
++)
1033 adapter
->msix_entries
[i
].entry
= i
;
1035 err
= pci_enable_msix(adapter
->pdev
,
1036 adapter
->msix_entries
, 3);
1041 dev_err(&adapter
->pdev
->dev
,
1042 "Failed to initialize MSI-X interrupts.\n");
1043 igbvf_reset_interrupt_capability(adapter
);
1048 * igbvf_request_msix - Initialize MSI-X interrupts
1050 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1053 static int igbvf_request_msix(struct igbvf_adapter
*adapter
)
1055 struct net_device
*netdev
= adapter
->netdev
;
1056 int err
= 0, vector
= 0;
1058 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5)) {
1059 sprintf(adapter
->tx_ring
->name
, "%s-tx-0", netdev
->name
);
1060 sprintf(adapter
->rx_ring
->name
, "%s-rx-0", netdev
->name
);
1062 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1063 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1066 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1067 igbvf_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
1072 adapter
->tx_ring
->itr_register
= E1000_EITR(vector
);
1073 adapter
->tx_ring
->itr_val
= adapter
->current_itr
;
1076 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1077 igbvf_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1082 adapter
->rx_ring
->itr_register
= E1000_EITR(vector
);
1083 adapter
->rx_ring
->itr_val
= adapter
->current_itr
;
1086 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1087 igbvf_msix_other
, 0, netdev
->name
, netdev
);
1091 igbvf_configure_msix(adapter
);
1098 * igbvf_alloc_queues - Allocate memory for all rings
1099 * @adapter: board private structure to initialize
1101 static int igbvf_alloc_queues(struct igbvf_adapter
*adapter
)
1103 struct net_device
*netdev
= adapter
->netdev
;
1105 adapter
->tx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1106 if (!adapter
->tx_ring
)
1109 adapter
->rx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1110 if (!adapter
->rx_ring
) {
1111 kfree(adapter
->tx_ring
);
1115 netif_napi_add(netdev
, &adapter
->rx_ring
->napi
, igbvf_poll
, 64);
1121 * igbvf_request_irq - initialize interrupts
1123 * Attempts to configure interrupts using the best available
1124 * capabilities of the hardware and kernel.
1126 static int igbvf_request_irq(struct igbvf_adapter
*adapter
)
1130 /* igbvf supports msi-x only */
1131 if (adapter
->msix_entries
)
1132 err
= igbvf_request_msix(adapter
);
1137 dev_err(&adapter
->pdev
->dev
,
1138 "Unable to allocate interrupt, Error: %d\n", err
);
1143 static void igbvf_free_irq(struct igbvf_adapter
*adapter
)
1145 struct net_device
*netdev
= adapter
->netdev
;
1148 if (adapter
->msix_entries
) {
1149 for (vector
= 0; vector
< 3; vector
++)
1150 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1155 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1157 static void igbvf_irq_disable(struct igbvf_adapter
*adapter
)
1159 struct e1000_hw
*hw
= &adapter
->hw
;
1163 if (adapter
->msix_entries
)
1168 * igbvf_irq_enable - Enable default interrupt generation settings
1170 static void igbvf_irq_enable(struct igbvf_adapter
*adapter
)
1172 struct e1000_hw
*hw
= &adapter
->hw
;
1174 ew32(EIAC
, adapter
->eims_enable_mask
);
1175 ew32(EIAM
, adapter
->eims_enable_mask
);
1176 ew32(EIMS
, adapter
->eims_enable_mask
);
1180 * igbvf_poll - NAPI Rx polling callback
1181 * @napi: struct associated with this polling callback
1182 * @budget: amount of packets driver is allowed to process this poll
1184 static int igbvf_poll(struct napi_struct
*napi
, int budget
)
1186 struct igbvf_ring
*rx_ring
= container_of(napi
, struct igbvf_ring
, napi
);
1187 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
1188 struct e1000_hw
*hw
= &adapter
->hw
;
1191 igbvf_clean_rx_irq(adapter
, &work_done
, budget
);
1193 /* If not enough Rx work done, exit the polling mode */
1194 if (work_done
< budget
) {
1195 napi_complete(napi
);
1197 if (adapter
->requested_itr
& 3)
1198 igbvf_set_itr(adapter
);
1200 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1201 ew32(EIMS
, adapter
->rx_ring
->eims_value
);
1208 * igbvf_set_rlpml - set receive large packet maximum length
1209 * @adapter: board private structure
1211 * Configure the maximum size of packets that will be received
1213 static void igbvf_set_rlpml(struct igbvf_adapter
*adapter
)
1216 struct e1000_hw
*hw
= &adapter
->hw
;
1218 max_frame_size
= adapter
->max_frame_size
+ VLAN_TAG_SIZE
;
1219 e1000_rlpml_set_vf(hw
, max_frame_size
);
1222 static int igbvf_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
1224 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1225 struct e1000_hw
*hw
= &adapter
->hw
;
1227 if (hw
->mac
.ops
.set_vfta(hw
, vid
, true)) {
1228 dev_err(&adapter
->pdev
->dev
, "Failed to add vlan id %d\n", vid
);
1231 set_bit(vid
, adapter
->active_vlans
);
1235 static int igbvf_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
1237 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1238 struct e1000_hw
*hw
= &adapter
->hw
;
1240 if (hw
->mac
.ops
.set_vfta(hw
, vid
, false)) {
1241 dev_err(&adapter
->pdev
->dev
,
1242 "Failed to remove vlan id %d\n", vid
);
1245 clear_bit(vid
, adapter
->active_vlans
);
1249 static void igbvf_restore_vlan(struct igbvf_adapter
*adapter
)
1253 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
1254 igbvf_vlan_rx_add_vid(adapter
->netdev
, vid
);
1258 * igbvf_configure_tx - Configure Transmit Unit after Reset
1259 * @adapter: board private structure
1261 * Configure the Tx unit of the MAC after a reset.
1263 static void igbvf_configure_tx(struct igbvf_adapter
*adapter
)
1265 struct e1000_hw
*hw
= &adapter
->hw
;
1266 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1268 u32 txdctl
, dca_txctrl
;
1270 /* disable transmits */
1271 txdctl
= er32(TXDCTL(0));
1272 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1276 /* Setup the HW Tx Head and Tail descriptor pointers */
1277 ew32(TDLEN(0), tx_ring
->count
* sizeof(union e1000_adv_tx_desc
));
1278 tdba
= tx_ring
->dma
;
1279 ew32(TDBAL(0), (tdba
& DMA_BIT_MASK(32)));
1280 ew32(TDBAH(0), (tdba
>> 32));
1283 tx_ring
->head
= E1000_TDH(0);
1284 tx_ring
->tail
= E1000_TDT(0);
1286 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1287 * MUST be delivered in order or it will completely screw up
1290 dca_txctrl
= er32(DCA_TXCTRL(0));
1291 dca_txctrl
&= ~E1000_DCA_TXCTRL_TX_WB_RO_EN
;
1292 ew32(DCA_TXCTRL(0), dca_txctrl
);
1294 /* enable transmits */
1295 txdctl
|= E1000_TXDCTL_QUEUE_ENABLE
;
1296 ew32(TXDCTL(0), txdctl
);
1298 /* Setup Transmit Descriptor Settings for eop descriptor */
1299 adapter
->txd_cmd
= E1000_ADVTXD_DCMD_EOP
| E1000_ADVTXD_DCMD_IFCS
;
1301 /* enable Report Status bit */
1302 adapter
->txd_cmd
|= E1000_ADVTXD_DCMD_RS
;
1306 * igbvf_setup_srrctl - configure the receive control registers
1307 * @adapter: Board private structure
1309 static void igbvf_setup_srrctl(struct igbvf_adapter
*adapter
)
1311 struct e1000_hw
*hw
= &adapter
->hw
;
1314 srrctl
&= ~(E1000_SRRCTL_DESCTYPE_MASK
|
1315 E1000_SRRCTL_BSIZEHDR_MASK
|
1316 E1000_SRRCTL_BSIZEPKT_MASK
);
1318 /* Enable queue drop to avoid head of line blocking */
1319 srrctl
|= E1000_SRRCTL_DROP_EN
;
1321 /* Setup buffer sizes */
1322 srrctl
|= ALIGN(adapter
->rx_buffer_len
, 1024) >>
1323 E1000_SRRCTL_BSIZEPKT_SHIFT
;
1325 if (adapter
->rx_buffer_len
< 2048) {
1326 adapter
->rx_ps_hdr_size
= 0;
1327 srrctl
|= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1329 adapter
->rx_ps_hdr_size
= 128;
1330 srrctl
|= adapter
->rx_ps_hdr_size
<<
1331 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1332 srrctl
|= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS
;
1335 ew32(SRRCTL(0), srrctl
);
1339 * igbvf_configure_rx - Configure Receive Unit after Reset
1340 * @adapter: board private structure
1342 * Configure the Rx unit of the MAC after a reset.
1344 static void igbvf_configure_rx(struct igbvf_adapter
*adapter
)
1346 struct e1000_hw
*hw
= &adapter
->hw
;
1347 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
1351 /* disable receives */
1352 rxdctl
= er32(RXDCTL(0));
1353 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1357 rdlen
= rx_ring
->count
* sizeof(union e1000_adv_rx_desc
);
1360 * Setup the HW Rx Head and Tail Descriptor Pointers and
1361 * the Base and Length of the Rx Descriptor Ring
1363 rdba
= rx_ring
->dma
;
1364 ew32(RDBAL(0), (rdba
& DMA_BIT_MASK(32)));
1365 ew32(RDBAH(0), (rdba
>> 32));
1366 ew32(RDLEN(0), rx_ring
->count
* sizeof(union e1000_adv_rx_desc
));
1367 rx_ring
->head
= E1000_RDH(0);
1368 rx_ring
->tail
= E1000_RDT(0);
1372 rxdctl
|= E1000_RXDCTL_QUEUE_ENABLE
;
1373 rxdctl
&= 0xFFF00000;
1374 rxdctl
|= IGBVF_RX_PTHRESH
;
1375 rxdctl
|= IGBVF_RX_HTHRESH
<< 8;
1376 rxdctl
|= IGBVF_RX_WTHRESH
<< 16;
1378 igbvf_set_rlpml(adapter
);
1380 /* enable receives */
1381 ew32(RXDCTL(0), rxdctl
);
1385 * igbvf_set_multi - Multicast and Promiscuous mode set
1386 * @netdev: network interface device structure
1388 * The set_multi entry point is called whenever the multicast address
1389 * list or the network interface flags are updated. This routine is
1390 * responsible for configuring the hardware for proper multicast,
1391 * promiscuous mode, and all-multi behavior.
1393 static void igbvf_set_multi(struct net_device
*netdev
)
1395 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1396 struct e1000_hw
*hw
= &adapter
->hw
;
1397 struct netdev_hw_addr
*ha
;
1398 u8
*mta_list
= NULL
;
1401 if (!netdev_mc_empty(netdev
)) {
1402 mta_list
= kmalloc_array(netdev_mc_count(netdev
), ETH_ALEN
,
1408 /* prepare a packed array of only addresses. */
1410 netdev_for_each_mc_addr(ha
, netdev
)
1411 memcpy(mta_list
+ (i
++ * ETH_ALEN
), ha
->addr
, ETH_ALEN
);
1413 hw
->mac
.ops
.update_mc_addr_list(hw
, mta_list
, i
, 0, 0);
1418 * igbvf_configure - configure the hardware for Rx and Tx
1419 * @adapter: private board structure
1421 static void igbvf_configure(struct igbvf_adapter
*adapter
)
1423 igbvf_set_multi(adapter
->netdev
);
1425 igbvf_restore_vlan(adapter
);
1427 igbvf_configure_tx(adapter
);
1428 igbvf_setup_srrctl(adapter
);
1429 igbvf_configure_rx(adapter
);
1430 igbvf_alloc_rx_buffers(adapter
->rx_ring
,
1431 igbvf_desc_unused(adapter
->rx_ring
));
1434 /* igbvf_reset - bring the hardware into a known good state
1436 * This function boots the hardware and enables some settings that
1437 * require a configuration cycle of the hardware - those cannot be
1438 * set/changed during runtime. After reset the device needs to be
1439 * properly configured for Rx, Tx etc.
1441 static void igbvf_reset(struct igbvf_adapter
*adapter
)
1443 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1444 struct net_device
*netdev
= adapter
->netdev
;
1445 struct e1000_hw
*hw
= &adapter
->hw
;
1447 /* Allow time for pending master requests to run */
1448 if (mac
->ops
.reset_hw(hw
))
1449 dev_err(&adapter
->pdev
->dev
, "PF still resetting\n");
1451 mac
->ops
.init_hw(hw
);
1453 if (is_valid_ether_addr(adapter
->hw
.mac
.addr
)) {
1454 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
,
1456 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
,
1460 adapter
->last_reset
= jiffies
;
1463 int igbvf_up(struct igbvf_adapter
*adapter
)
1465 struct e1000_hw
*hw
= &adapter
->hw
;
1467 /* hardware has been reset, we need to reload some things */
1468 igbvf_configure(adapter
);
1470 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1472 napi_enable(&adapter
->rx_ring
->napi
);
1473 if (adapter
->msix_entries
)
1474 igbvf_configure_msix(adapter
);
1476 /* Clear any pending interrupts. */
1478 igbvf_irq_enable(adapter
);
1480 /* start the watchdog */
1481 hw
->mac
.get_link_status
= 1;
1482 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1488 void igbvf_down(struct igbvf_adapter
*adapter
)
1490 struct net_device
*netdev
= adapter
->netdev
;
1491 struct e1000_hw
*hw
= &adapter
->hw
;
1495 * signal that we're down so the interrupt handler does not
1496 * reschedule our watchdog timer
1498 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1500 /* disable receives in the hardware */
1501 rxdctl
= er32(RXDCTL(0));
1502 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1504 netif_stop_queue(netdev
);
1506 /* disable transmits in the hardware */
1507 txdctl
= er32(TXDCTL(0));
1508 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1510 /* flush both disables and wait for them to finish */
1514 napi_disable(&adapter
->rx_ring
->napi
);
1516 igbvf_irq_disable(adapter
);
1518 del_timer_sync(&adapter
->watchdog_timer
);
1520 netif_carrier_off(netdev
);
1522 /* record the stats before reset*/
1523 igbvf_update_stats(adapter
);
1525 adapter
->link_speed
= 0;
1526 adapter
->link_duplex
= 0;
1528 igbvf_reset(adapter
);
1529 igbvf_clean_tx_ring(adapter
->tx_ring
);
1530 igbvf_clean_rx_ring(adapter
->rx_ring
);
1533 void igbvf_reinit_locked(struct igbvf_adapter
*adapter
)
1536 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
1538 igbvf_down(adapter
);
1540 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
1544 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1545 * @adapter: board private structure to initialize
1547 * igbvf_sw_init initializes the Adapter private data structure.
1548 * Fields are initialized based on PCI device information and
1549 * OS network device settings (MTU size).
1551 static int igbvf_sw_init(struct igbvf_adapter
*adapter
)
1553 struct net_device
*netdev
= adapter
->netdev
;
1556 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
1557 adapter
->rx_ps_hdr_size
= 0;
1558 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
1559 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
1561 adapter
->tx_int_delay
= 8;
1562 adapter
->tx_abs_int_delay
= 32;
1563 adapter
->rx_int_delay
= 0;
1564 adapter
->rx_abs_int_delay
= 8;
1565 adapter
->requested_itr
= 3;
1566 adapter
->current_itr
= IGBVF_START_ITR
;
1568 /* Set various function pointers */
1569 adapter
->ei
->init_ops(&adapter
->hw
);
1571 rc
= adapter
->hw
.mac
.ops
.init_params(&adapter
->hw
);
1575 rc
= adapter
->hw
.mbx
.ops
.init_params(&adapter
->hw
);
1579 igbvf_set_interrupt_capability(adapter
);
1581 if (igbvf_alloc_queues(adapter
))
1584 spin_lock_init(&adapter
->tx_queue_lock
);
1586 /* Explicitly disable IRQ since the NIC can be in any state. */
1587 igbvf_irq_disable(adapter
);
1589 spin_lock_init(&adapter
->stats_lock
);
1591 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1595 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter
*adapter
)
1597 struct e1000_hw
*hw
= &adapter
->hw
;
1599 adapter
->stats
.last_gprc
= er32(VFGPRC
);
1600 adapter
->stats
.last_gorc
= er32(VFGORC
);
1601 adapter
->stats
.last_gptc
= er32(VFGPTC
);
1602 adapter
->stats
.last_gotc
= er32(VFGOTC
);
1603 adapter
->stats
.last_mprc
= er32(VFMPRC
);
1604 adapter
->stats
.last_gotlbc
= er32(VFGOTLBC
);
1605 adapter
->stats
.last_gptlbc
= er32(VFGPTLBC
);
1606 adapter
->stats
.last_gorlbc
= er32(VFGORLBC
);
1607 adapter
->stats
.last_gprlbc
= er32(VFGPRLBC
);
1609 adapter
->stats
.base_gprc
= er32(VFGPRC
);
1610 adapter
->stats
.base_gorc
= er32(VFGORC
);
1611 adapter
->stats
.base_gptc
= er32(VFGPTC
);
1612 adapter
->stats
.base_gotc
= er32(VFGOTC
);
1613 adapter
->stats
.base_mprc
= er32(VFMPRC
);
1614 adapter
->stats
.base_gotlbc
= er32(VFGOTLBC
);
1615 adapter
->stats
.base_gptlbc
= er32(VFGPTLBC
);
1616 adapter
->stats
.base_gorlbc
= er32(VFGORLBC
);
1617 adapter
->stats
.base_gprlbc
= er32(VFGPRLBC
);
1621 * igbvf_open - Called when a network interface is made active
1622 * @netdev: network interface device structure
1624 * Returns 0 on success, negative value on failure
1626 * The open entry point is called when a network interface is made
1627 * active by the system (IFF_UP). At this point all resources needed
1628 * for transmit and receive operations are allocated, the interrupt
1629 * handler is registered with the OS, the watchdog timer is started,
1630 * and the stack is notified that the interface is ready.
1632 static int igbvf_open(struct net_device
*netdev
)
1634 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1635 struct e1000_hw
*hw
= &adapter
->hw
;
1638 /* disallow open during test */
1639 if (test_bit(__IGBVF_TESTING
, &adapter
->state
))
1642 /* allocate transmit descriptors */
1643 err
= igbvf_setup_tx_resources(adapter
, adapter
->tx_ring
);
1647 /* allocate receive descriptors */
1648 err
= igbvf_setup_rx_resources(adapter
, adapter
->rx_ring
);
1653 * before we allocate an interrupt, we must be ready to handle it.
1654 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1655 * as soon as we call pci_request_irq, so we have to setup our
1656 * clean_rx handler before we do so.
1658 igbvf_configure(adapter
);
1660 err
= igbvf_request_irq(adapter
);
1664 /* From here on the code is the same as igbvf_up() */
1665 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1667 napi_enable(&adapter
->rx_ring
->napi
);
1669 /* clear any pending interrupts */
1672 igbvf_irq_enable(adapter
);
1674 /* start the watchdog */
1675 hw
->mac
.get_link_status
= 1;
1676 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1681 igbvf_free_rx_resources(adapter
->rx_ring
);
1683 igbvf_free_tx_resources(adapter
->tx_ring
);
1685 igbvf_reset(adapter
);
1691 * igbvf_close - Disables a network interface
1692 * @netdev: network interface device structure
1694 * Returns 0, this is not allowed to fail
1696 * The close entry point is called when an interface is de-activated
1697 * by the OS. The hardware is still under the drivers control, but
1698 * needs to be disabled. A global MAC reset is issued to stop the
1699 * hardware, and all transmit and receive resources are freed.
1701 static int igbvf_close(struct net_device
*netdev
)
1703 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1705 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
1706 igbvf_down(adapter
);
1708 igbvf_free_irq(adapter
);
1710 igbvf_free_tx_resources(adapter
->tx_ring
);
1711 igbvf_free_rx_resources(adapter
->rx_ring
);
1716 * igbvf_set_mac - Change the Ethernet Address of the NIC
1717 * @netdev: network interface device structure
1718 * @p: pointer to an address structure
1720 * Returns 0 on success, negative on failure
1722 static int igbvf_set_mac(struct net_device
*netdev
, void *p
)
1724 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1725 struct e1000_hw
*hw
= &adapter
->hw
;
1726 struct sockaddr
*addr
= p
;
1728 if (!is_valid_ether_addr(addr
->sa_data
))
1729 return -EADDRNOTAVAIL
;
1731 memcpy(hw
->mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
1733 hw
->mac
.ops
.rar_set(hw
, hw
->mac
.addr
, 0);
1735 if (memcmp(addr
->sa_data
, hw
->mac
.addr
, 6))
1736 return -EADDRNOTAVAIL
;
1738 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1743 #define UPDATE_VF_COUNTER(reg, name) \
1745 u32 current_counter = er32(reg); \
1746 if (current_counter < adapter->stats.last_##name) \
1747 adapter->stats.name += 0x100000000LL; \
1748 adapter->stats.last_##name = current_counter; \
1749 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1750 adapter->stats.name |= current_counter; \
1754 * igbvf_update_stats - Update the board statistics counters
1755 * @adapter: board private structure
1757 void igbvf_update_stats(struct igbvf_adapter
*adapter
)
1759 struct e1000_hw
*hw
= &adapter
->hw
;
1760 struct pci_dev
*pdev
= adapter
->pdev
;
1763 * Prevent stats update while adapter is being reset, link is down
1764 * or if the pci connection is down.
1766 if (adapter
->link_speed
== 0)
1769 if (test_bit(__IGBVF_RESETTING
, &adapter
->state
))
1772 if (pci_channel_offline(pdev
))
1775 UPDATE_VF_COUNTER(VFGPRC
, gprc
);
1776 UPDATE_VF_COUNTER(VFGORC
, gorc
);
1777 UPDATE_VF_COUNTER(VFGPTC
, gptc
);
1778 UPDATE_VF_COUNTER(VFGOTC
, gotc
);
1779 UPDATE_VF_COUNTER(VFMPRC
, mprc
);
1780 UPDATE_VF_COUNTER(VFGOTLBC
, gotlbc
);
1781 UPDATE_VF_COUNTER(VFGPTLBC
, gptlbc
);
1782 UPDATE_VF_COUNTER(VFGORLBC
, gorlbc
);
1783 UPDATE_VF_COUNTER(VFGPRLBC
, gprlbc
);
1785 /* Fill out the OS statistics structure */
1786 adapter
->net_stats
.multicast
= adapter
->stats
.mprc
;
1789 static void igbvf_print_link_info(struct igbvf_adapter
*adapter
)
1791 dev_info(&adapter
->pdev
->dev
, "Link is Up %d Mbps %s Duplex\n",
1792 adapter
->link_speed
,
1793 adapter
->link_duplex
== FULL_DUPLEX
? "Full" : "Half");
1796 static bool igbvf_has_link(struct igbvf_adapter
*adapter
)
1798 struct e1000_hw
*hw
= &adapter
->hw
;
1799 s32 ret_val
= E1000_SUCCESS
;
1802 /* If interface is down, stay link down */
1803 if (test_bit(__IGBVF_DOWN
, &adapter
->state
))
1806 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
1807 link_active
= !hw
->mac
.get_link_status
;
1809 /* if check for link returns error we will need to reset */
1810 if (ret_val
&& time_after(jiffies
, adapter
->last_reset
+ (10 * HZ
)))
1811 schedule_work(&adapter
->reset_task
);
1817 * igbvf_watchdog - Timer Call-back
1818 * @data: pointer to adapter cast into an unsigned long
1820 static void igbvf_watchdog(unsigned long data
)
1822 struct igbvf_adapter
*adapter
= (struct igbvf_adapter
*) data
;
1824 /* Do the rest outside of interrupt context */
1825 schedule_work(&adapter
->watchdog_task
);
1828 static void igbvf_watchdog_task(struct work_struct
*work
)
1830 struct igbvf_adapter
*adapter
= container_of(work
,
1831 struct igbvf_adapter
,
1833 struct net_device
*netdev
= adapter
->netdev
;
1834 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1835 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1836 struct e1000_hw
*hw
= &adapter
->hw
;
1840 link
= igbvf_has_link(adapter
);
1843 if (!netif_carrier_ok(netdev
)) {
1844 mac
->ops
.get_link_up_info(&adapter
->hw
,
1845 &adapter
->link_speed
,
1846 &adapter
->link_duplex
);
1847 igbvf_print_link_info(adapter
);
1849 netif_carrier_on(netdev
);
1850 netif_wake_queue(netdev
);
1853 if (netif_carrier_ok(netdev
)) {
1854 adapter
->link_speed
= 0;
1855 adapter
->link_duplex
= 0;
1856 dev_info(&adapter
->pdev
->dev
, "Link is Down\n");
1857 netif_carrier_off(netdev
);
1858 netif_stop_queue(netdev
);
1862 if (netif_carrier_ok(netdev
)) {
1863 igbvf_update_stats(adapter
);
1865 tx_pending
= (igbvf_desc_unused(tx_ring
) + 1 <
1869 * We've lost link, so the controller stops DMA,
1870 * but we've got queued Tx work that's never going
1871 * to get done, so reset controller to flush Tx.
1872 * (Do the reset outside of interrupt context).
1874 adapter
->tx_timeout_count
++;
1875 schedule_work(&adapter
->reset_task
);
1879 /* Cause software interrupt to ensure Rx ring is cleaned */
1880 ew32(EICS
, adapter
->rx_ring
->eims_value
);
1882 /* Reset the timer */
1883 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1884 mod_timer(&adapter
->watchdog_timer
,
1885 round_jiffies(jiffies
+ (2 * HZ
)));
1888 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1889 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1890 #define IGBVF_TX_FLAGS_TSO 0x00000004
1891 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1892 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1893 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1895 static int igbvf_tso(struct igbvf_adapter
*adapter
,
1896 struct igbvf_ring
*tx_ring
,
1897 struct sk_buff
*skb
, u32 tx_flags
, u8
*hdr_len
)
1899 struct e1000_adv_tx_context_desc
*context_desc
;
1902 struct igbvf_buffer
*buffer_info
;
1903 u32 info
= 0, tu_cmd
= 0;
1904 u32 mss_l4len_idx
, l4len
;
1907 if (skb_header_cloned(skb
)) {
1908 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1910 dev_err(&adapter
->pdev
->dev
,
1911 "igbvf_tso returning an error\n");
1916 l4len
= tcp_hdrlen(skb
);
1919 if (skb
->protocol
== htons(ETH_P_IP
)) {
1920 struct iphdr
*iph
= ip_hdr(skb
);
1923 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1927 } else if (skb_is_gso_v6(skb
)) {
1928 ipv6_hdr(skb
)->payload_len
= 0;
1929 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
1930 &ipv6_hdr(skb
)->daddr
,
1934 i
= tx_ring
->next_to_use
;
1936 buffer_info
= &tx_ring
->buffer_info
[i
];
1937 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
1938 /* VLAN MACLEN IPLEN */
1939 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
1940 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
1941 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
1942 *hdr_len
+= skb_network_offset(skb
);
1943 info
|= (skb_transport_header(skb
) - skb_network_header(skb
));
1944 *hdr_len
+= (skb_transport_header(skb
) - skb_network_header(skb
));
1945 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
1947 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1948 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
1950 if (skb
->protocol
== htons(ETH_P_IP
))
1951 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
1952 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
1954 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
1957 mss_l4len_idx
= (skb_shinfo(skb
)->gso_size
<< E1000_ADVTXD_MSS_SHIFT
);
1958 mss_l4len_idx
|= (l4len
<< E1000_ADVTXD_L4LEN_SHIFT
);
1960 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
1961 context_desc
->seqnum_seed
= 0;
1963 buffer_info
->time_stamp
= jiffies
;
1964 buffer_info
->next_to_watch
= i
;
1965 buffer_info
->dma
= 0;
1967 if (i
== tx_ring
->count
)
1970 tx_ring
->next_to_use
= i
;
1975 static inline bool igbvf_tx_csum(struct igbvf_adapter
*adapter
,
1976 struct igbvf_ring
*tx_ring
,
1977 struct sk_buff
*skb
, u32 tx_flags
)
1979 struct e1000_adv_tx_context_desc
*context_desc
;
1981 struct igbvf_buffer
*buffer_info
;
1982 u32 info
= 0, tu_cmd
= 0;
1984 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) ||
1985 (tx_flags
& IGBVF_TX_FLAGS_VLAN
)) {
1986 i
= tx_ring
->next_to_use
;
1987 buffer_info
= &tx_ring
->buffer_info
[i
];
1988 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
1990 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
1991 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
1993 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
1994 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
1995 info
|= (skb_transport_header(skb
) -
1996 skb_network_header(skb
));
1999 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2001 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2003 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
2004 switch (skb
->protocol
) {
2005 case __constant_htons(ETH_P_IP
):
2006 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2007 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2008 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2010 case __constant_htons(ETH_P_IPV6
):
2011 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2012 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2019 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2020 context_desc
->seqnum_seed
= 0;
2021 context_desc
->mss_l4len_idx
= 0;
2023 buffer_info
->time_stamp
= jiffies
;
2024 buffer_info
->next_to_watch
= i
;
2025 buffer_info
->dma
= 0;
2027 if (i
== tx_ring
->count
)
2029 tx_ring
->next_to_use
= i
;
2037 static int igbvf_maybe_stop_tx(struct net_device
*netdev
, int size
)
2039 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2041 /* there is enough descriptors then we don't need to worry */
2042 if (igbvf_desc_unused(adapter
->tx_ring
) >= size
)
2045 netif_stop_queue(netdev
);
2049 /* We need to check again just in case room has been made available */
2050 if (igbvf_desc_unused(adapter
->tx_ring
) < size
)
2053 netif_wake_queue(netdev
);
2055 ++adapter
->restart_queue
;
2059 #define IGBVF_MAX_TXD_PWR 16
2060 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2062 static inline int igbvf_tx_map_adv(struct igbvf_adapter
*adapter
,
2063 struct igbvf_ring
*tx_ring
,
2064 struct sk_buff
*skb
,
2067 struct igbvf_buffer
*buffer_info
;
2068 struct pci_dev
*pdev
= adapter
->pdev
;
2069 unsigned int len
= skb_headlen(skb
);
2070 unsigned int count
= 0, i
;
2073 i
= tx_ring
->next_to_use
;
2075 buffer_info
= &tx_ring
->buffer_info
[i
];
2076 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2077 buffer_info
->length
= len
;
2078 /* set time_stamp *before* dma to help avoid a possible race */
2079 buffer_info
->time_stamp
= jiffies
;
2080 buffer_info
->next_to_watch
= i
;
2081 buffer_info
->mapped_as_page
= false;
2082 buffer_info
->dma
= dma_map_single(&pdev
->dev
, skb
->data
, len
,
2084 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2088 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++) {
2089 const struct skb_frag_struct
*frag
;
2093 if (i
== tx_ring
->count
)
2096 frag
= &skb_shinfo(skb
)->frags
[f
];
2097 len
= skb_frag_size(frag
);
2099 buffer_info
= &tx_ring
->buffer_info
[i
];
2100 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2101 buffer_info
->length
= len
;
2102 buffer_info
->time_stamp
= jiffies
;
2103 buffer_info
->next_to_watch
= i
;
2104 buffer_info
->mapped_as_page
= true;
2105 buffer_info
->dma
= skb_frag_dma_map(&pdev
->dev
, frag
, 0, len
,
2107 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2111 tx_ring
->buffer_info
[i
].skb
= skb
;
2112 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2117 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2119 /* clear timestamp and dma mappings for failed buffer_info mapping */
2120 buffer_info
->dma
= 0;
2121 buffer_info
->time_stamp
= 0;
2122 buffer_info
->length
= 0;
2123 buffer_info
->next_to_watch
= 0;
2124 buffer_info
->mapped_as_page
= false;
2128 /* clear timestamp and dma mappings for remaining portion of packet */
2131 i
+= tx_ring
->count
;
2133 buffer_info
= &tx_ring
->buffer_info
[i
];
2134 igbvf_put_txbuf(adapter
, buffer_info
);
2140 static inline void igbvf_tx_queue_adv(struct igbvf_adapter
*adapter
,
2141 struct igbvf_ring
*tx_ring
,
2142 int tx_flags
, int count
, u32 paylen
,
2145 union e1000_adv_tx_desc
*tx_desc
= NULL
;
2146 struct igbvf_buffer
*buffer_info
;
2147 u32 olinfo_status
= 0, cmd_type_len
;
2150 cmd_type_len
= (E1000_ADVTXD_DTYP_DATA
| E1000_ADVTXD_DCMD_IFCS
|
2151 E1000_ADVTXD_DCMD_DEXT
);
2153 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
2154 cmd_type_len
|= E1000_ADVTXD_DCMD_VLE
;
2156 if (tx_flags
& IGBVF_TX_FLAGS_TSO
) {
2157 cmd_type_len
|= E1000_ADVTXD_DCMD_TSE
;
2159 /* insert tcp checksum */
2160 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2162 /* insert ip checksum */
2163 if (tx_flags
& IGBVF_TX_FLAGS_IPV4
)
2164 olinfo_status
|= E1000_TXD_POPTS_IXSM
<< 8;
2166 } else if (tx_flags
& IGBVF_TX_FLAGS_CSUM
) {
2167 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2170 olinfo_status
|= ((paylen
- hdr_len
) << E1000_ADVTXD_PAYLEN_SHIFT
);
2172 i
= tx_ring
->next_to_use
;
2174 buffer_info
= &tx_ring
->buffer_info
[i
];
2175 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
2176 tx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2177 tx_desc
->read
.cmd_type_len
=
2178 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
2179 tx_desc
->read
.olinfo_status
= cpu_to_le32(olinfo_status
);
2181 if (i
== tx_ring
->count
)
2185 tx_desc
->read
.cmd_type_len
|= cpu_to_le32(adapter
->txd_cmd
);
2186 /* Force memory writes to complete before letting h/w
2187 * know there are new descriptors to fetch. (Only
2188 * applicable for weak-ordered memory model archs,
2189 * such as IA-64). */
2192 tx_ring
->next_to_use
= i
;
2193 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2194 /* we need this if more than one processor can write to our tail
2195 * at a time, it syncronizes IO on IA64/Altix systems */
2199 static netdev_tx_t
igbvf_xmit_frame_ring_adv(struct sk_buff
*skb
,
2200 struct net_device
*netdev
,
2201 struct igbvf_ring
*tx_ring
)
2203 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2204 unsigned int first
, tx_flags
= 0;
2209 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2210 dev_kfree_skb_any(skb
);
2211 return NETDEV_TX_OK
;
2214 if (skb
->len
<= 0) {
2215 dev_kfree_skb_any(skb
);
2216 return NETDEV_TX_OK
;
2220 * need: count + 4 desc gap to keep tail from touching
2221 * + 2 desc gap to keep tail from touching head,
2222 * + 1 desc for skb->data,
2223 * + 1 desc for context descriptor,
2224 * head, otherwise try next time
2226 if (igbvf_maybe_stop_tx(netdev
, skb_shinfo(skb
)->nr_frags
+ 4)) {
2227 /* this is a hard error */
2228 return NETDEV_TX_BUSY
;
2231 if (vlan_tx_tag_present(skb
)) {
2232 tx_flags
|= IGBVF_TX_FLAGS_VLAN
;
2233 tx_flags
|= (vlan_tx_tag_get(skb
) << IGBVF_TX_FLAGS_VLAN_SHIFT
);
2236 if (skb
->protocol
== htons(ETH_P_IP
))
2237 tx_flags
|= IGBVF_TX_FLAGS_IPV4
;
2239 first
= tx_ring
->next_to_use
;
2241 tso
= skb_is_gso(skb
) ?
2242 igbvf_tso(adapter
, tx_ring
, skb
, tx_flags
, &hdr_len
) : 0;
2243 if (unlikely(tso
< 0)) {
2244 dev_kfree_skb_any(skb
);
2245 return NETDEV_TX_OK
;
2249 tx_flags
|= IGBVF_TX_FLAGS_TSO
;
2250 else if (igbvf_tx_csum(adapter
, tx_ring
, skb
, tx_flags
) &&
2251 (skb
->ip_summed
== CHECKSUM_PARTIAL
))
2252 tx_flags
|= IGBVF_TX_FLAGS_CSUM
;
2255 * count reflects descriptors mapped, if 0 then mapping error
2256 * has occurred and we need to rewind the descriptor queue
2258 count
= igbvf_tx_map_adv(adapter
, tx_ring
, skb
, first
);
2261 igbvf_tx_queue_adv(adapter
, tx_ring
, tx_flags
, count
,
2263 /* Make sure there is space in the ring for the next send. */
2264 igbvf_maybe_stop_tx(netdev
, MAX_SKB_FRAGS
+ 4);
2266 dev_kfree_skb_any(skb
);
2267 tx_ring
->buffer_info
[first
].time_stamp
= 0;
2268 tx_ring
->next_to_use
= first
;
2271 return NETDEV_TX_OK
;
2274 static netdev_tx_t
igbvf_xmit_frame(struct sk_buff
*skb
,
2275 struct net_device
*netdev
)
2277 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2278 struct igbvf_ring
*tx_ring
;
2280 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2281 dev_kfree_skb_any(skb
);
2282 return NETDEV_TX_OK
;
2285 tx_ring
= &adapter
->tx_ring
[0];
2287 return igbvf_xmit_frame_ring_adv(skb
, netdev
, tx_ring
);
2291 * igbvf_tx_timeout - Respond to a Tx Hang
2292 * @netdev: network interface device structure
2294 static void igbvf_tx_timeout(struct net_device
*netdev
)
2296 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2298 /* Do the reset outside of interrupt context */
2299 adapter
->tx_timeout_count
++;
2300 schedule_work(&adapter
->reset_task
);
2303 static void igbvf_reset_task(struct work_struct
*work
)
2305 struct igbvf_adapter
*adapter
;
2306 adapter
= container_of(work
, struct igbvf_adapter
, reset_task
);
2308 igbvf_reinit_locked(adapter
);
2312 * igbvf_get_stats - Get System Network Statistics
2313 * @netdev: network interface device structure
2315 * Returns the address of the device statistics structure.
2316 * The statistics are actually updated from the timer callback.
2318 static struct net_device_stats
*igbvf_get_stats(struct net_device
*netdev
)
2320 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2322 /* only return the current stats */
2323 return &adapter
->net_stats
;
2327 * igbvf_change_mtu - Change the Maximum Transfer Unit
2328 * @netdev: network interface device structure
2329 * @new_mtu: new value for maximum frame size
2331 * Returns 0 on success, negative on failure
2333 static int igbvf_change_mtu(struct net_device
*netdev
, int new_mtu
)
2335 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2336 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
2338 if ((new_mtu
< 68) || (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
2339 dev_err(&adapter
->pdev
->dev
, "Invalid MTU setting\n");
2343 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2344 if (max_frame
> MAX_STD_JUMBO_FRAME_SIZE
) {
2345 dev_err(&adapter
->pdev
->dev
, "MTU > 9216 not supported.\n");
2349 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
2351 /* igbvf_down has a dependency on max_frame_size */
2352 adapter
->max_frame_size
= max_frame
;
2353 if (netif_running(netdev
))
2354 igbvf_down(adapter
);
2357 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2358 * means we reserve 2 more, this pushes us to allocate from the next
2360 * i.e. RXBUFFER_2048 --> size-4096 slab
2361 * However with the new *_jumbo_rx* routines, jumbo receives will use
2365 if (max_frame
<= 1024)
2366 adapter
->rx_buffer_len
= 1024;
2367 else if (max_frame
<= 2048)
2368 adapter
->rx_buffer_len
= 2048;
2370 #if (PAGE_SIZE / 2) > 16384
2371 adapter
->rx_buffer_len
= 16384;
2373 adapter
->rx_buffer_len
= PAGE_SIZE
/ 2;
2377 /* adjust allocation if LPE protects us, and we aren't using SBP */
2378 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
2379 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
2380 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+
2383 dev_info(&adapter
->pdev
->dev
, "changing MTU from %d to %d\n",
2384 netdev
->mtu
, new_mtu
);
2385 netdev
->mtu
= new_mtu
;
2387 if (netif_running(netdev
))
2390 igbvf_reset(adapter
);
2392 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
2397 static int igbvf_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
2405 static int igbvf_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2407 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2408 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2413 netif_device_detach(netdev
);
2415 if (netif_running(netdev
)) {
2416 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
2417 igbvf_down(adapter
);
2418 igbvf_free_irq(adapter
);
2422 retval
= pci_save_state(pdev
);
2427 pci_disable_device(pdev
);
2433 static int igbvf_resume(struct pci_dev
*pdev
)
2435 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2436 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2439 pci_restore_state(pdev
);
2440 err
= pci_enable_device_mem(pdev
);
2442 dev_err(&pdev
->dev
, "Cannot enable PCI device from suspend\n");
2446 pci_set_master(pdev
);
2448 if (netif_running(netdev
)) {
2449 err
= igbvf_request_irq(adapter
);
2454 igbvf_reset(adapter
);
2456 if (netif_running(netdev
))
2459 netif_device_attach(netdev
);
2465 static void igbvf_shutdown(struct pci_dev
*pdev
)
2467 igbvf_suspend(pdev
, PMSG_SUSPEND
);
2470 #ifdef CONFIG_NET_POLL_CONTROLLER
2472 * Polling 'interrupt' - used by things like netconsole to send skbs
2473 * without having to re-enable interrupts. It's not called while
2474 * the interrupt routine is executing.
2476 static void igbvf_netpoll(struct net_device
*netdev
)
2478 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2480 disable_irq(adapter
->pdev
->irq
);
2482 igbvf_clean_tx_irq(adapter
->tx_ring
);
2484 enable_irq(adapter
->pdev
->irq
);
2489 * igbvf_io_error_detected - called when PCI error is detected
2490 * @pdev: Pointer to PCI device
2491 * @state: The current pci connection state
2493 * This function is called after a PCI bus error affecting
2494 * this device has been detected.
2496 static pci_ers_result_t
igbvf_io_error_detected(struct pci_dev
*pdev
,
2497 pci_channel_state_t state
)
2499 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2500 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2502 netif_device_detach(netdev
);
2504 if (state
== pci_channel_io_perm_failure
)
2505 return PCI_ERS_RESULT_DISCONNECT
;
2507 if (netif_running(netdev
))
2508 igbvf_down(adapter
);
2509 pci_disable_device(pdev
);
2511 /* Request a slot slot reset. */
2512 return PCI_ERS_RESULT_NEED_RESET
;
2516 * igbvf_io_slot_reset - called after the pci bus has been reset.
2517 * @pdev: Pointer to PCI device
2519 * Restart the card from scratch, as if from a cold-boot. Implementation
2520 * resembles the first-half of the igbvf_resume routine.
2522 static pci_ers_result_t
igbvf_io_slot_reset(struct pci_dev
*pdev
)
2524 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2525 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2527 if (pci_enable_device_mem(pdev
)) {
2529 "Cannot re-enable PCI device after reset.\n");
2530 return PCI_ERS_RESULT_DISCONNECT
;
2532 pci_set_master(pdev
);
2534 igbvf_reset(adapter
);
2536 return PCI_ERS_RESULT_RECOVERED
;
2540 * igbvf_io_resume - called when traffic can start flowing again.
2541 * @pdev: Pointer to PCI device
2543 * This callback is called when the error recovery driver tells us that
2544 * its OK to resume normal operation. Implementation resembles the
2545 * second-half of the igbvf_resume routine.
2547 static void igbvf_io_resume(struct pci_dev
*pdev
)
2549 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2550 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2552 if (netif_running(netdev
)) {
2553 if (igbvf_up(adapter
)) {
2555 "can't bring device back up after reset\n");
2560 netif_device_attach(netdev
);
2563 static void igbvf_print_device_info(struct igbvf_adapter
*adapter
)
2565 struct e1000_hw
*hw
= &adapter
->hw
;
2566 struct net_device
*netdev
= adapter
->netdev
;
2567 struct pci_dev
*pdev
= adapter
->pdev
;
2569 if (hw
->mac
.type
== e1000_vfadapt_i350
)
2570 dev_info(&pdev
->dev
, "Intel(R) I350 Virtual Function\n");
2572 dev_info(&pdev
->dev
, "Intel(R) 82576 Virtual Function\n");
2573 dev_info(&pdev
->dev
, "Address: %pM\n", netdev
->dev_addr
);
2576 static int igbvf_set_features(struct net_device
*netdev
,
2577 netdev_features_t features
)
2579 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2581 if (features
& NETIF_F_RXCSUM
)
2582 adapter
->flags
&= ~IGBVF_FLAG_RX_CSUM_DISABLED
;
2584 adapter
->flags
|= IGBVF_FLAG_RX_CSUM_DISABLED
;
2589 static const struct net_device_ops igbvf_netdev_ops
= {
2590 .ndo_open
= igbvf_open
,
2591 .ndo_stop
= igbvf_close
,
2592 .ndo_start_xmit
= igbvf_xmit_frame
,
2593 .ndo_get_stats
= igbvf_get_stats
,
2594 .ndo_set_rx_mode
= igbvf_set_multi
,
2595 .ndo_set_mac_address
= igbvf_set_mac
,
2596 .ndo_change_mtu
= igbvf_change_mtu
,
2597 .ndo_do_ioctl
= igbvf_ioctl
,
2598 .ndo_tx_timeout
= igbvf_tx_timeout
,
2599 .ndo_vlan_rx_add_vid
= igbvf_vlan_rx_add_vid
,
2600 .ndo_vlan_rx_kill_vid
= igbvf_vlan_rx_kill_vid
,
2601 #ifdef CONFIG_NET_POLL_CONTROLLER
2602 .ndo_poll_controller
= igbvf_netpoll
,
2604 .ndo_set_features
= igbvf_set_features
,
2608 * igbvf_probe - Device Initialization Routine
2609 * @pdev: PCI device information struct
2610 * @ent: entry in igbvf_pci_tbl
2612 * Returns 0 on success, negative on failure
2614 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2615 * The OS initialization, configuring of the adapter private structure,
2616 * and a hardware reset occur.
2618 static int igbvf_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2620 struct net_device
*netdev
;
2621 struct igbvf_adapter
*adapter
;
2622 struct e1000_hw
*hw
;
2623 const struct igbvf_info
*ei
= igbvf_info_tbl
[ent
->driver_data
];
2625 static int cards_found
;
2626 int err
, pci_using_dac
;
2628 err
= pci_enable_device_mem(pdev
);
2633 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64));
2635 err
= dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
2639 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
2641 err
= dma_set_coherent_mask(&pdev
->dev
,
2644 dev_err(&pdev
->dev
, "No usable DMA "
2645 "configuration, aborting\n");
2651 err
= pci_request_regions(pdev
, igbvf_driver_name
);
2655 pci_set_master(pdev
);
2658 netdev
= alloc_etherdev(sizeof(struct igbvf_adapter
));
2660 goto err_alloc_etherdev
;
2662 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2664 pci_set_drvdata(pdev
, netdev
);
2665 adapter
= netdev_priv(netdev
);
2667 adapter
->netdev
= netdev
;
2668 adapter
->pdev
= pdev
;
2670 adapter
->pba
= ei
->pba
;
2671 adapter
->flags
= ei
->flags
;
2672 adapter
->hw
.back
= adapter
;
2673 adapter
->hw
.mac
.type
= ei
->mac
;
2674 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
2676 /* PCI config space info */
2678 hw
->vendor_id
= pdev
->vendor
;
2679 hw
->device_id
= pdev
->device
;
2680 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
2681 hw
->subsystem_device_id
= pdev
->subsystem_device
;
2682 hw
->revision_id
= pdev
->revision
;
2685 adapter
->hw
.hw_addr
= ioremap(pci_resource_start(pdev
, 0),
2686 pci_resource_len(pdev
, 0));
2688 if (!adapter
->hw
.hw_addr
)
2691 if (ei
->get_variants
) {
2692 err
= ei
->get_variants(adapter
);
2697 /* setup adapter struct */
2698 err
= igbvf_sw_init(adapter
);
2702 /* construct the net_device struct */
2703 netdev
->netdev_ops
= &igbvf_netdev_ops
;
2705 igbvf_set_ethtool_ops(netdev
);
2706 netdev
->watchdog_timeo
= 5 * HZ
;
2707 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
2709 adapter
->bd_number
= cards_found
++;
2711 netdev
->hw_features
= NETIF_F_SG
|
2718 netdev
->features
= netdev
->hw_features
|
2719 NETIF_F_HW_VLAN_TX
|
2720 NETIF_F_HW_VLAN_RX
|
2721 NETIF_F_HW_VLAN_FILTER
;
2724 netdev
->features
|= NETIF_F_HIGHDMA
;
2726 netdev
->vlan_features
|= NETIF_F_TSO
;
2727 netdev
->vlan_features
|= NETIF_F_TSO6
;
2728 netdev
->vlan_features
|= NETIF_F_IP_CSUM
;
2729 netdev
->vlan_features
|= NETIF_F_IPV6_CSUM
;
2730 netdev
->vlan_features
|= NETIF_F_SG
;
2732 /*reset the controller to put the device in a known good state */
2733 err
= hw
->mac
.ops
.reset_hw(hw
);
2735 dev_info(&pdev
->dev
,
2736 "PF still in reset state. Is the PF interface up?\n");
2738 err
= hw
->mac
.ops
.read_mac_addr(hw
);
2740 dev_info(&pdev
->dev
, "Error reading MAC address.\n");
2741 else if (is_zero_ether_addr(adapter
->hw
.mac
.addr
))
2742 dev_info(&pdev
->dev
, "MAC address not assigned by administrator.\n");
2743 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
,
2747 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
2748 dev_info(&pdev
->dev
, "Assigning random MAC address.\n");
2749 eth_hw_addr_random(netdev
);
2750 memcpy(adapter
->hw
.mac
.addr
, netdev
->dev_addr
,
2754 setup_timer(&adapter
->watchdog_timer
, &igbvf_watchdog
,
2755 (unsigned long) adapter
);
2757 INIT_WORK(&adapter
->reset_task
, igbvf_reset_task
);
2758 INIT_WORK(&adapter
->watchdog_task
, igbvf_watchdog_task
);
2760 /* ring size defaults */
2761 adapter
->rx_ring
->count
= 1024;
2762 adapter
->tx_ring
->count
= 1024;
2764 /* reset the hardware with the new settings */
2765 igbvf_reset(adapter
);
2767 /* set hardware-specific flags */
2768 if (adapter
->hw
.mac
.type
== e1000_vfadapt_i350
)
2769 adapter
->flags
|= IGBVF_FLAG_RX_LB_VLAN_BSWAP
;
2771 strcpy(netdev
->name
, "eth%d");
2772 err
= register_netdev(netdev
);
2776 /* tell the stack to leave us alone until igbvf_open() is called */
2777 netif_carrier_off(netdev
);
2778 netif_stop_queue(netdev
);
2780 igbvf_print_device_info(adapter
);
2782 igbvf_initialize_last_counter_stats(adapter
);
2787 kfree(adapter
->tx_ring
);
2788 kfree(adapter
->rx_ring
);
2790 igbvf_reset_interrupt_capability(adapter
);
2791 iounmap(adapter
->hw
.hw_addr
);
2793 free_netdev(netdev
);
2795 pci_release_regions(pdev
);
2798 pci_disable_device(pdev
);
2803 * igbvf_remove - Device Removal Routine
2804 * @pdev: PCI device information struct
2806 * igbvf_remove is called by the PCI subsystem to alert the driver
2807 * that it should release a PCI device. The could be caused by a
2808 * Hot-Plug event, or because the driver is going to be removed from
2811 static void igbvf_remove(struct pci_dev
*pdev
)
2813 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2814 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2815 struct e1000_hw
*hw
= &adapter
->hw
;
2818 * The watchdog timer may be rescheduled, so explicitly
2819 * disable it from being rescheduled.
2821 set_bit(__IGBVF_DOWN
, &adapter
->state
);
2822 del_timer_sync(&adapter
->watchdog_timer
);
2824 cancel_work_sync(&adapter
->reset_task
);
2825 cancel_work_sync(&adapter
->watchdog_task
);
2827 unregister_netdev(netdev
);
2829 igbvf_reset_interrupt_capability(adapter
);
2832 * it is important to delete the napi struct prior to freeing the
2833 * rx ring so that you do not end up with null pointer refs
2835 netif_napi_del(&adapter
->rx_ring
->napi
);
2836 kfree(adapter
->tx_ring
);
2837 kfree(adapter
->rx_ring
);
2839 iounmap(hw
->hw_addr
);
2840 if (hw
->flash_address
)
2841 iounmap(hw
->flash_address
);
2842 pci_release_regions(pdev
);
2844 free_netdev(netdev
);
2846 pci_disable_device(pdev
);
2849 /* PCI Error Recovery (ERS) */
2850 static const struct pci_error_handlers igbvf_err_handler
= {
2851 .error_detected
= igbvf_io_error_detected
,
2852 .slot_reset
= igbvf_io_slot_reset
,
2853 .resume
= igbvf_io_resume
,
2856 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl
) = {
2857 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_VF
), board_vf
},
2858 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_I350_VF
), board_i350_vf
},
2859 { } /* terminate list */
2861 MODULE_DEVICE_TABLE(pci
, igbvf_pci_tbl
);
2863 /* PCI Device API Driver */
2864 static struct pci_driver igbvf_driver
= {
2865 .name
= igbvf_driver_name
,
2866 .id_table
= igbvf_pci_tbl
,
2867 .probe
= igbvf_probe
,
2868 .remove
= igbvf_remove
,
2870 /* Power Management Hooks */
2871 .suspend
= igbvf_suspend
,
2872 .resume
= igbvf_resume
,
2874 .shutdown
= igbvf_shutdown
,
2875 .err_handler
= &igbvf_err_handler
2879 * igbvf_init_module - Driver Registration Routine
2881 * igbvf_init_module is the first routine called when the driver is
2882 * loaded. All it does is register with the PCI subsystem.
2884 static int __init
igbvf_init_module(void)
2887 pr_info("%s - version %s\n", igbvf_driver_string
, igbvf_driver_version
);
2888 pr_info("%s\n", igbvf_copyright
);
2890 ret
= pci_register_driver(&igbvf_driver
);
2894 module_init(igbvf_init_module
);
2897 * igbvf_exit_module - Driver Exit Cleanup Routine
2899 * igbvf_exit_module is called just before the driver is removed
2902 static void __exit
igbvf_exit_module(void)
2904 pci_unregister_driver(&igbvf_driver
);
2906 module_exit(igbvf_exit_module
);
2909 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2910 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
2911 MODULE_LICENSE("GPL");
2912 MODULE_VERSION(DRV_VERSION
);